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KVM: async_pf: change async_pf_execute() to use get_user_pages(tsk => NULL)

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async_pf_execute() passes tsk == current to gup(), this is doesn't
hurt but unnecessary and misleading. "tsk" is only used to account
the number of faults and current is the random workqueue thread.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit e9545b9f8a)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Oleg Nesterov 2014-04-28 17:03:00 +02:00 committed by Christoffer Dall
parent 2a1992b43b
commit 4c158ade8e
1 changed files with 1 additions and 1 deletions
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2
virt/kvm/async_pf.c
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@ -81,7 +81,7 @@ static void async_pf_execute(struct work_struct *work)
might_sleep();
down_read(&mm->mmap_sem);
get_user_pages(current, mm, addr, 1, 1, 0, NULL, NULL);
get_user_pages(NULL, mm, addr, 1, 1, 0, NULL, NULL);
up_read(&mm->mmap_sem);
kvm_async_page_present_sync(vcpu, apf);